<html>

<head>
  <title>Illustration of containing blocks</title>
</head>

<body id="body">
  <div id="div1">
    <p id="p1">This is text in the first paragraph...</P>
    <p id="p2">This is text
      <em id="em1"> in the
        <strong id="strong1">second
        </strong> paragraph.
      </em>
    </p>
  </div>
</body>

</html>